单选题 Which of the following, if it could be demonstrated, would most support the traditional view of ocean basin formation?

A、 The upper mantle of the earth behaves as a dense solid.
B、 Movements usually occur along lines.
C、 Sinking plates cool the surface of the earth.
D、 The rising motion currents keep exact pace with them.

【正确答案】 B

【答案解析】on the other hand说明后面的理论同第一段的地壳运动一起支持海洋盆地形成理论，而且从第二段首句"On the other hand，the theory is unconvincing because the movements do not normally occur along lines，and it certainly does not occur along lines broken by frequent changes in direction，as the ridge is．”可以看出这种理论是不能令人信服的。所以正确答案为B。